How I Can Check If App Installed

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hi
i have this code to check if .net installed , and it work very good

C#

string key;
bool data = false;

 try
            {
                key = Registry.LocalMachine.OpenSubKey("SOFTWARE").OpenSubKey("Microsoft").OpenSubKey("Windows").OpenSubKey("CurrentVersion").OpenSubKey("Uninstall").GetValue("50727").ToString();
            }
            catch (Exception)
            {
            }
data = (key == "50727-50727");
label1.text = "installed";

i tried to used same code with change the location for anothor apps but it faild

32bit system

C#

string key1;
bool data1 = false;


try
          {
              key1 = Registry.LocalMachine.OpenSubKey("SOFTWARE").OpenSubKey("Wow6432Node").OpenSubKey("Microsoft").OpenSubKey("Windows").OpenSubKey("CurrentVersion").OpenSubKey("Uninstall").OpenSubKey("Mozilla Firefox 38.0.1 (x86 en-GB)").GetValue("DisplayName").ToString();
          }
          catch (Exception)
          {
          }

          data1 = (key1 == "Mozilla Firefox 38.0.1 (x86 en-GB)");

          label10.Text = "Mozilla Firefox - " + data1.ToString();

64bit system

C#

string key1;
 bool data1 = false;


 try
           {
               key1 = Registry.LocalMachine.OpenSubKey("SOFTWARE").OpenSubKey("Microsoft").OpenSubKey("Windows").OpenSubKey("CurrentVersion").OpenSubKey("Uninstall").OpenSubKey("Mozilla Firefox 38.0.1 (x86 en-GB)").GetValue("DisplayName").ToString();
           }
           catch (Exception)
           {
           }

           data1 = (key1 == "Mozilla Firefox 38.0.1 (x86 en-GB)");

           label10.Text = "Mozilla Firefox - " + data1.ToString();

any idea ?

Posted 3-Jun-15 18:33pm

Golden Basim

Updated 3-Jun-15 18:34pm

v3

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2 solutions

Solution 1

Read this : http://stackoverflow.com/questions/908850/get-installed-applications-in-a-system[^]

Posted 3-Jun-15 18:59pm

Mehdi Gholam

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Golden Basim · Accepted Answer · 2015-06-04T10:57:00

thanks for all , this solved my Q
Check if application is installed in registry

C#

public static bool checkInstalled (string c_name)
{
    string displayName;

    string registryKey = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
    RegistryKey key = Registry.LocalMachine.OpenSubKey(registryKey);
    if (key != null)
    {
        foreach (RegistryKey subkey in key.GetSubKeyNames().Select(keyName => key.OpenSubKey(keyName)))
        {
            displayName = subkey.GetValue("DisplayName") as string;
            if (displayName != null && displayName.Contains(c_name))
            {
                return true;
            }
        }
        key.Close();
    }

    registryKey = @"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall";
    key = Registry.LocalMachine.OpenSubKey(registryKey);
    if (key != null)
    {
        foreach (RegistryKey subkey in key.GetSubKeyNames().Select(keyName => key.OpenSubKey(keyName)))
        {
            displayName = subkey.GetValue("DisplayName") as string;
            if (displayName != null && displayName.Contains(c_name))
            {
                return true;
            }
        }
        key.Close();
    }
    return false;
}

And I simply just call it using

SQL

if(checkInstalled("Application Name"))